In my search I found that the actual valve and manifold tube is the same as used as used on the Super C tractors and you are more likely to find one for them but their still not easy to find. The control lever and rod for the Super C is very different than that used with the Super A. I only found two maybe three other Super A's thru forums and googling with this option that had the proper lever. This part is somewhat of a "unicorn".

The special bolts and rubber boot for this valve are available thru the aftermarket and the cost reflects the rarity of the part.
(a 1" rubber boot should not cost $40

Needless to say in my hands this won't be used for a trailing plow but it will be used to power angle a snowplow (graderblade).
That will make that chore easier sparing me from having to climb on and off the tractor to change the blades angle and give my knees a break.

Here is the Operators Manual for this option.
(Sorry I'm not trying to make work for anyone but I don't know how to convert this to a pdf file with what I have. I'm googling it but not sure if I have the program to do it. My computer's don't have "Word" or the like. Scanning this, down loading it to Flickr then finding the link line that works for this forum can be involved with flickr. Maybe if I had the program to convert to a pdf it'd be easier.)











